A slipped sheet bend is tied exactly like a regular
sheet bend, but at the end instead of running the free
end all the way through, only a bight made from the free end
is pushed through as shown in figure 7.
Figure 8 shows a completed slipped sheet bend.

Figure 7. Tying a slipped sheet bend
Figure 8. Slipped sheet bend

The advantage of the slipped sheet bend is that it
is just as secure as a regular sheet bend, but can undone
by pulling on the free end shown in figure 8.

Figure 12 shows how the two-hole bowline starts with two holes for
the running end of the rope to pass through to form the
non-slip loop.
Finish, like a simple bowline, by going around the running (long)
end, but make sure to go back through both holes as shown in figure 13.

The advantage of the two-hole bowline is that it is
more secure than a simple bowline.
It is used by some rock climbers
to secure a belaying rope to their harness because,
after a load has been placed on it, it is easier to untie
than the traced figure-eight knot that is commonly used.

Another variation is to use the two-hole starting with
the French bowline to make it even more secure.

Starting with a simple slip knot, thread the free end as shown
in figure 16. Tighten by pulling carefully and evenly as shown
in figure 17 to maintain the shape of the knot.

Figure 16. Tying a bowstring knot
Figure 17. Bowstring knot

The bowstring knot forms a very secure loop in the end of the
rope and the free end is tucked neatly inside the loop.
This knot can be tied more easily than a bowline in very thick rope and will
not slide even in very thick, slippery rope.